This study on frozen shoulder addressed the null hypothesis that there is no difference in the motion of scapula against the thoracic wall between affected and non-affected shoulder.

Adult patients with unilateral shoulder pain lasted for more than one month, accompanied by passive and active limitation of range of motion in all directions will be included. Patients with bilateral involvement, history of trauma, history of surgery on the affected shoulder, history of fracture, shoulder osteoarthritis, symptoms less than one month and any signs of rotator cuff tear will be excluded. MR imaging will be done to exclude other pathologies and frank rotator cuff tear.

Inclusion Criteria:

• adult patients with unilateral shoulder pain lasted for more than one month, accompanied by passive and active limitation of range of motion in all directions

Exclusion Criteria:

• bilateral involvement, history of trauma, history of surgery on the affected shoulder, history of fracture, shoulder osteoarthritis, symptoms less than one month and any signs of rotator cuff tear. MRI will be done to rull out the rotator cuff tear.